Conciseness

The body is dense reference material — parameter tables with defaults, response-field lists, error codes, and usage rules — with no explanation of concepts Claude already knows and no padding; even the 20 MB ring-buffer worked example is contract-critical information. Every token earns its place, matching the lean-and-efficient anchor.

Actionability

Every tool is fully executable guidance: exact parameter names, required flags, defaults, JSON response shapes for each call pattern, error codes, and concrete rules like "Use background true (not bare --background) for commands expected to run longer than 30 seconds". This covers the common cases copy-paste ready, per the fully-executable anchor.

Workflow Clarity

Usage Rules and the numbered BackgroundJobReceipt procedure provide sequence and an explicit validation/error-recovery checkpoint ("If status=failed, investigate and take corrective action"), but the full background-job lifecycle (start → wait/monitor → handle receipt) must be assembled across two sections rather than presented as one sequenced workflow, and some checkpoints are implicit. This fits 'clear sequence with most checkpoints present; minor validation gaps' better than the explicit-checklist anchor at 5.

Progressive Disclosure

A single well-sectioned file (Tools, Parameters, Response Fields, Errors, Usage Rules, BackgroundJobReceipt) with no nested or dangling references and appropriate inlining for a six-tool surface. It misses the 5 anchor because at 119 lines roughly half the body is parameter/response reference that could eventually live in a separate reference file — a minor organization gap, not the misplacement described by the 3 anchor.

Specificity

"Background job management — start, monitor, wait, stop long-running commands" lists four concrete actions, and the trigger clause adds "check job status, read job output", covering the full tool surface (start, list/get, output, wait, stop). This matches the comprehensive-coverage anchor rather than the 'minor gaps' anchor below it.

Completeness

It explicitly answers both questions: the what ("start, monitor, wait, stop long-running commands") and the when ("ALWAYS invoke this skill when the user asks to run background tasks, check job status, read job output, or manage long-running commands") with concrete trigger phrases, matching the 5 anchor exactly.

Trigger Term Quality

Natural phrases like "run background tasks", "check job status", "read job output", and "manage long-running commands" are exactly what users would say, but common synonyms are missing (e.g. "background process", "kill/stop a process", "is it still running", "tail the output"). Good coverage with a few natural terms missing fits the 4 anchor; it is not comprehensive enough for 5.

Distinctiveness Conflict Risk

The background/long-running job niche with job-status/output triggers is mostly distinct, but "run background tasks" carries minor overlap risk with closely related generic shell/command-execution skills, fitting the 'mostly distinct; minor overlap risk' anchor rather than the minimal-conflict anchor.